Etymologies

snipe +‎ -er (Wiktionary)

Examples

And I think one of the reasons that the police are steadfastly avoiding the use of the term sniper is they don't want anyone to lock their mind into what they think a sniper is, and therefore, possibly not turn someone in to the police because he doesn't look like a sniper.

To the average western man, who has an aversion to what he considers unsportsmanlike conduct, merely the mention of the word sniper evokes an image of an evil little foreign man sneaking through the jungles of Okinawa picking off the good guys, or of a merciless Viet Cong hiding in a tree waiting for the opportunity to kill a 19-year-old GI from Des Moines or Wichita as he walks patrol at Nha Trang.

It was a lone female cop that stopped the Ft Hood shooter; it was a deputy and a citizen that put an end to the UT Austin sniper; it was individuals that stopped AA 93 over PA and stopped the “underwear bomber”.

So whilst I may make mistakes, and I am sure I will again at some point in the future, but I'd rather read another blogger like me who shows they are human, stands up to be counted and doesn't hide behind some electronic veil rather than be a sniper from the sidelines who offers nothing other than barbs and bile.